# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
# See LICENSE for more details.
#
# Copyright: Red Hat Inc. 2014
# Author: Lucas Meneghel Rodrigues <lmr@redhat.com>
"""
HTML output module.
"""

import base64
import codecs
import os
import platform
import subprocess
import sys
import time

import jinja2 as jinja

from avocado.core import exit_codes
from avocado.core.output import LOG_UI
from avocado.core.plugin_interfaces import CLI, Init, Result
from avocado.core.settings import settings
from avocado.utils import astring
from avocado.utils.path import find_command


class ReportModel:

    """
    Prepares an object that can be passed up to mustache for rendering.
    """

    def __init__(self, result, html_output):
        self.result = result
        self.html_output = html_output
        self.html_output_dir = os.path.abspath(os.path.dirname(html_output))

    def results_dir(self, relative_links=True):
        results_dir = os.path.abspath(os.path.dirname(self.result.logfile))
        if relative_links:
            return os.path.relpath(results_dir, self.html_output_dir)
        else:
            return results_dir

    def results_dir_basename(self):
        return os.path.basename(self.results_dir(False))

    def _get_sysinfo(self, sysinfo_file):
        sysinfo_path = os.path.join(
            self.results_dir(False), "sysinfo", "pre", sysinfo_file
        )
        try:
            with open(sysinfo_path, "r", encoding="utf-8") as sysinfo_file:
                sysinfo_contents = sysinfo_file.read()
        except (OSError, IOError) as details:
            sysinfo_contents = f"Error reading {sysinfo_path}: {details}"
        return sysinfo_contents

    @staticmethod
    def _icon_data(icon_name):
        with open(
            os.path.join(
                os.path.dirname(os.path.abspath(__file__)),
                "templates",
                "images",
                icon_name,
            ),
            "rb",
        ) as icon:
            icon_base64 = base64.b64encode(icon.read()).decode()
        return icon_base64

    @property
    def hostname(self):
        return self._get_sysinfo("hostname").strip()

    @property
    def logs_icon(self):
        return self._icon_data("logs_icon.svg")

    @property
    def whiteboard_icon(self):
        return self._icon_data("whiteboard_icon.svg")

    @property
    def tests(self):
        mapping = {
            "SKIP": "warning",
            "ERROR": "danger",
            "FAIL": "danger",
            "WARN": "warning",
            "PASS": "success",
            "INTERRUPTED": "danger",
            "CANCEL": "warning",
        }
        test_info = []
        results_dir = self.results_dir(False)
        for tst in self.result.tests:
            formatted = {}
            formatted["uid"] = tst["name"].uid
            formatted["name"] = tst["name"].name
            if "params" in tst:
                params = ""
                try:
                    parameters = "Params:\n"
                    for path, key, value in tst["params"]:
                        parameters += f"  {path}:{key} => {value}\n"
                except KeyError:
                    pass
                else:
                    params = parameters
            else:
                params = "No params"
            formatted["params"] = params
            formatted["variant"] = tst["name"].variant or ""
            formatted["status"] = tst["status"]
            logdir = os.path.join(results_dir, "test-results", tst["logdir"])
            formatted["logdir"] = os.path.relpath(logdir, self.html_output_dir)
            logfile = os.path.join(logdir, "debug.log")
            formatted["logfile"] = os.path.relpath(logfile, self.html_output_dir)
            formatted["logfile_basename"] = os.path.basename(logfile)
            formatted["time"] = f"{tst['time_elapsed']:.2f}"
            local_time_start = time.localtime(tst["actual_time_start"])
            formatted["time_start"] = time.strftime(
                "%Y-%m-%d %H:%M:%S", local_time_start
            )
            formatted["row_class"] = mapping[tst["status"]]
            formatted["whiteboard"] = tst.get("whiteboard", "")
            fail_reason = tst.get("fail_reason")
            if fail_reason is None:
                fail_reason = ""
            fail_reason = astring.to_text(fail_reason)
            formatted["fail_reason"] = fail_reason
            test_info.append(formatted)
        return test_info

    def _sysinfo_phase(self, phase):
        """
        Returns a list of system information for a given sysinfo phase

        :param section: a valid sysinfo phase, such as pre, post or profile
        """
        sysinfo_list = []
        base_path = os.path.join(self.results_dir(False), "sysinfo", phase)
        try:
            sysinfo_files = os.listdir(base_path)
        except OSError:
            return sysinfo_list
        sysinfo_files.sort()
        s_id = 1
        for s_f in sysinfo_files:
            sysinfo_dict = {}
            sysinfo_path = os.path.join(base_path, s_f)
            sysinfo_dict["file"] = s_f
            sysinfo_dict["element_id"] = f"{phase}_heading_{s_id}"
            sysinfo_dict["collapse_id"] = f"{phase}_collapse_{s_id}"
            try:
                with codecs.open(sysinfo_path, "r", encoding="utf-8") as sysinfo_file:
                    sysinfo_dict["contents"] = sysinfo_file.read()
            except (OSError, UnicodeDecodeError) as details:
                path = os.path.relpath(sysinfo_path, self.html_output_dir)
                sysinfo_dict["err"] = "Error reading sysinfo file"
                sysinfo_dict["err_file"] = path
                sysinfo_dict["err_details"] = details
            sysinfo_list.append(sysinfo_dict)
            s_id += 1
        return sysinfo_list

    @property
    def sysinfo_pre(self):
        return self._sysinfo_phase("pre")

    @property
    def sysinfo_profile(self):
        return self._sysinfo_phase("profile")

    @property
    def sysinfo_post(self):
        return self._sysinfo_phase("post")


class HTMLResult(Result):

    """
    HTML Test Result class.
    """

    name = "html"
    description = "HTML result support"

    @staticmethod
    def _open_browser(html_path):
        # if possible, put browser in separate process
        # group, so keyboard interrupts don't affect
        # browser as well as Python
        setsid = getattr(os, "setsid", None)
        if not setsid:
            setsid = getattr(os, "setpgrp", None)
        in_out = open(os.devnull, "r+", encoding="utf-8")
        if "macOS" in platform.platform():
            open_path = find_command("open", default=None)
        else:
            open_path = find_command("xdg-open", default=None)
        if open_path:
            cmd = [open_path, html_path]
            # pylint: disable=W1509
            subprocess.Popen(
                cmd,
                close_fds=True,
                stdin=in_out,
                stdout=in_out,
                stderr=in_out,
                preexec_fn=setsid,
            )

    @staticmethod
    def _render(result, output_path):
        # Workaround for systems with older versions of jinja2 (before version 3)
        try:
            env = jinja.Environment(
                loader=jinja.PackageLoader("avocado_result_html"),
                autoescape=True,
            )
        except (TypeError, AssertionError):
            env = jinja.Environment(
                loader=jinja.PackageLoader("avocado_result_html.result_html"),
                autoescape=True,
            )
        template = env.get_template("results.html")
        report_contents = template.render({"data": ReportModel(result, output_path)})

        with codecs.open(output_path, "w", "utf-8") as report_file:
            report_file.write(report_contents)

    def render(self, result, job):
        if job.status in ("RUNNING", "ERROR", "FAIL"):
            return  # Don't create results on unfinished or errored jobs
        if not (
            job.config.get("job.run.result.html.enabled")
            or job.config.get("job.run.result.html.output")
        ):
            return

        open_browser = job.config.get("job.run.result.html.open_browser", False)
        if job.config.get("job.run.result.html.enabled"):
            html_path = os.path.join(job.logdir, "results.html")
            self._render(result, html_path)
            if job.config.get("stdout_claimed_by", None) is None:
                LOG_UI.info("JOB HTML   : %s", html_path)
            if open_browser:
                self._open_browser(html_path)
                open_browser = False

        html_path = job.config.get("job.run.result.html.output", None)
        if html_path is not None:
            self._render(result, html_path)
            if open_browser:
                self._open_browser(html_path)


class HTMLInit(Init):

    name = "htmlresult"
    description = "HTML job report options initialization"

    def initialize(self):
        section = "job.run.result.html"
        help_msg = (
            "Enable HTML output to the FILE where the result should "
            "be written. The value - (output to stdout) is not "
            "supported since not all HTML resources can be embedded "
            "into a single file (page resources will be copied to "
            "the output file dir)"
        )
        settings.register_option(
            section=section, key="output", default=None, help_msg=help_msg
        )

        help_msg = (
            "Open the generated report on your preferred browser. "
            "This works even if --html was not explicitly passed, "
            "since an HTML report is always generated on the job "
            "results dir."
        )
        settings.register_option(
            section=section,
            key="open_browser",
            key_type=bool,
            default=False,
            help_msg=help_msg,
        )

        help_msg = (
            "Enables default HTML result in the job results "
            'directory. File will be named "results.html".'
        )
        settings.register_option(
            section=section,
            key="enabled",
            key_type=bool,
            default=True,
            help_msg=help_msg,
        )


class HTML(CLI):

    """
    HTML job report
    """

    name = "htmlresult"
    description = "HTML job report options for 'run' subcommand"

    def configure(self, parser):
        run_subcommand_parser = parser.subcommands.choices.get("run", None)
        if run_subcommand_parser is None:
            return

        settings.add_argparser_to_option(
            namespace="job.run.result.html.output",
            parser=run_subcommand_parser,
            metavar="FILE",
            long_arg="--html",
        )

        settings.add_argparser_to_option(
            namespace="job.run.result.html.open_browser",
            parser=run_subcommand_parser,
            long_arg="--open-browser",
        )

        settings.add_argparser_to_option(
            namespace="job.run.result.html.enabled",
            parser=run_subcommand_parser,
            long_arg="--disable-html-job-result",
        )

    def run(self, config):
        if config.get("job.run.result.html.output") == "-":
            LOG_UI.error(
                "HTML to stdout not supported (not all HTML resources"
                " can be embedded on a single file)"
            )
            sys.exit(exit_codes.AVOCADO_JOB_FAIL)
